I have used a Bushhog RDTH72 the past 18 months to cut about 8 acres. About 3/4 of the 8 acres is pretty level, with rest somewhat rolling. No problems with scalping the sod. Mechanically, no problems at all. Good unit in my opinion.
If you get a chance you might want to look at some of the links on here for First Choice products. I've not used their finish mowers, but others on here speak highly of them. I finally got to look at the units last week and was very impressed, heavy duty construction and a very, very reasoanble price.
Even with no complaints on my Bushhog unit, I probably would have gone with the FC unit if I had it to do over again......AND you can also get them in the color of your tractor!
IndianaPaul